Remove Pom task dependenices rewrite (opensearch-project#4178)

### Description
The underlying issue associated with Pom validation was fixed in
OpenSearch [1], this causes the 'hack' that was used to unblock pom
generation in security to start causing problems in the distribution
builds.

- [1] opensearch-project/OpenSearch#12807

### Issues Resolved
- Fixes opensearch-project#4160

### Testing
Added new CI test that executes the same job used by the distribution
build and checks the expected artifacts exist

### Check List
- [X] New functionality includes testing
- [ ] ~New functionality has been documented~
- [X] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and
signing off your commits, please check
[here](https://github.com/opensearch-project/OpenSearch/blob/main/CONTRIBUTING.md#developer-certificate-of-origin).

Signed-off-by: Peter Nied <[email protected]>

.github/workflows/ci.yml

@@ -246,6 +246,8 @@ jobs:
 
     - run: ./gradlew clean assemble -Dbuild.version_qualifier=${{ env.TEST_QUALIFIER }} && test -s ./build/distributions/opensearch-security-${{ env.SECURITY_PLUGIN_VERSION_ONLY_NUMBER }}-${{ env.TEST_QUALIFIER }}-SNAPSHOT.zip
 
+    - run: ./gradlew clean publishPluginZipPublicationToZipStagingRepository && test -s ./build/distributions/opensearch-security-${{ env.SECURITY_PLUGIN_VERSION }}.zip && test -s ./build/distributions/opensearch-security-${{ env.SECURITY_PLUGIN_VERSION }}.pom
+
     - name: List files in the build directory if there was an error
       run: ls -al ./build/distributions/
       if: failure()

build.gradle

@@ -407,11 +407,6 @@ opensearchplugin {
 // This requires an additional Jar not published as part of build-tools
 loggerUsageCheck.enabled = false
 
-// No need to validate pom, as we do not upload to maven/sonatype
-tasks.matching {it.path in [":validateMavenPom", ":validateNebulaPom", ":validatePluginZipPom"]}.all { task ->
-    task.dependsOn ':generatePomFileForNebulaPublication', ':generatePomFileForPluginZipPublication', ':generatePomFileForMavenPublication'
-}
-
 publishing {
     publications {
         pluginZip(MavenPublication) { publication ->